One of the most important things before you start practicing or thinking about the system is understanding the origin and the physiological basis of the S.P.E.A.R. system. Learn more about the startle flinch component of this survival system. A Personal Defense Network (PDN) original video.

The self defense training philosophy, Identify the Problem and Do the Work is explained in detail by Craig Douglas from ShivWorks and PDN editor Rob Pincus. A Personal Defense Network (PDN) original video.